Verizon identified the glitch and the problem was fixed, according to a spokesman for Baltimore Mayor Stephanie Rawlings-Blake. There are no more delays, and normal operation resumed shortly after 10 p.m. Monday, officials said.

Officials with the 911 Call Center said they noticed a problem where callers were getting a busy signal or experiencing longer than usual wait times between 5-5:30 p.m. Monday. They said the problem escalated as the evening progressed.

City officials said they plan on monitoring the system to ensure there are no other problems.